Preparation by direct metal exchange and kinetic study of active site metal substituted class I and class II Clostridium histolyticum collagenases
- 1 September 1988
- journal article
- research article
- Published by American Chemical Society (ACS) in Biochemistry
- Vol. 27 (19), 7413-7418
- https://doi.org/10.1021/bi00419a036
Abstract
Active site metal substitutions for both .gamma.- and .zeta.-collagenases from Clostridum histolyticum have been made by direct metal exchange. The incubation of Co(II), Cu(II), Ni(II), Cd(II), and Hg(II) with these native collagenases results in changes in activity that parallel those observed for the reconstitution of the respective apoenzymes with these metal ions. For both collagenases, the exchange reactions with Co(II) and Cu(II) are complete within 1 min. However, the changes in activity observed on addition of Ni-(II), Cd(II), and Hg(II) to .gamma.-collagenase and Cd(II) and Hg(II) to .zeta.-collagenase are time dependent. The kinetic parameters Kcat and KM have been determined for each of the active metallospecies. The substitution of the active-site metal ion in .gamma.-collagenase results in changes in both kcat and KM, while the effect observed in .zeta.-collagenase is primarily on KM. This suggests that there are differences in the mechanisms of these two collagenases, at least with respect to the role of the zinc ion in catalysis.This publication has 9 references indexed in Scilit:
- Preparation and reconstitution with divalent metal ions of class I and class II Clostridium histolyticum apocollagenasesBiochemistry, 1988
- Studies on the stimulation of the bacterial, collagenolytic enzyme clostridiopeptidase a by cobalt (ii) ionsInternational Journal of Biochemistry, 1986
- Spectral and kinetic studies of metal-substituted Aeromonas aminopeptidase: nonidentical, interacting metal-binding sitesBiochemistry, 1985
- The functional role of zinc in angiotensin converting enzyme: implications for the enzyme mechanismJournal of Inorganic Biochemistry, 1985
- Relationship between the individual collagenases of Clostridium histolyticum: evidence for evolution by gene duplicationBiochemistry, 1984
- Purification and separation of individual collagenases of Clostridium histolyticum using red dye ligand chromatographyBiochemistry, 1984
- Kinetics of carboxypeptidase A. I. Hydrolysis of carbobenzoxyglycyl-L-phenylalanine, benzoylglycyl-L-phenylalanine, and hippuryl-DL-.beta.-phenyllactic acid by metal-substituted and acetylated carboxypeptidasesBiochemistry, 1968
- Kinetic Studies on the Action of CollagenaseThe Journal of Biochemistry, 1965
- Metallocarboxypeptidases: Stability Constants and Enzymatic CharacteristicsJournal of Biological Chemistry, 1961